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. Author manuscript; available in PMC: 2009 Jul 29.
Published in final edited form as: J Org Chem. 2008 Aug 2;73(17):6480–6488. doi: 10.1021/jo8008534

FIGURE 2.

FIGURE 2

Side and top views of the X-ray crystal structure of introverted acid H2a with bound chloroform. Ethyl groups have been shown as methyl groups for clarity. Hydrogen bonds are shown as dashed lines.